How many changes are there to the constitution

27 times.

Explanation:

The highest law of the U.S. is the Constitution of the United States.  It was approved on 17th September 1787 by the  Constitutional Convention in Philadelphia. However, during the course of time, the Thirteen States of the United States put it into effect. Since then the Constitution of the United States has been changed or modified 27 times. Among these changes, those primary ten changes are together known as the Bill of Rights.

the percentage of students at the school need special diets is

c) 10 percent

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others